Improvement in blackwashing devices



N. K. WADE.

BLACKW'ASHING DEVICE.

Patented May15, 1877.

I WQ ES////// UNITED STATES PATENT OFFICE.

NICHOLAS K. WADE, OF COLUMBUS, OHIO, ASSIGNOR TO HERBERT B.

SMITH, OF SAME PLAOE.

IMPROVEMENT lN BLACKWASHING DEVICES.

Specification forming part of Letters Patent No. 190,697, dated May 15,1877; application filed March 30, 1877.

To all whom it may concern Be it known that I, NIoHoLAs K. WADE, ofColumbus, in the county of Franklin and State of Ohio, have inventedcertain new and useful Improvements in Blackwashing Pipe- Molds, ofwhich the following is a speciflca' tion:

My invention relates to certain improvements especially adapted for usein connection with the invention of Herbert R. Smith, of Columbus, Ohio,as shown and claimed in his application, filed simultaneously herewith,and entitled Improvements in the art of molding and casting pipe, and inapparatus therefor.

The objects of my invention are to deflect the blackwash as it is pouredinto the mold toward and against the inside or walls of the mold; todistribute the blackwash evenly over the inner surface of the mold; andto protect the mold-heating jet-pipe or perforated tube in the center ofthe mold (forming part of the invention and application of said HerbertH. Smith above mentioned) from the blackwash, thus preventing theclogging or closing up of the perforations or jet-openings through whichpasses the hot air or gas for drying the" molds.

The subject-matter claimed will hereinafter specifically be designated.

In the accompanying drawing, which is a view, partly in elevation andpartly in vertical central section, my improvements are shown inconnection with a pit or chamber A, a gas or hot-air-supply pipe, B, aperforated tube or branch pipe, 0, and a flask, D, and mold E, all asshown and described in the above-mentioned application of Herbert R.Smith.

A hollow dasher or deflector, F, fits loosely over the upper end of theperforated central pipe (3 and serves to deflect the blackwash outwardagainst the inner sides of the mold, as well as distribute it evenly allaround, as is well understood. In this way the gas or hot-air tube wouldbe protected sufficiently but for the splashing of the blackwash. Toprevent all possibility of clogging the jet openings or outlets of thetube 0 it is incased from top to bottom, or throughout that portion ofits length which is perforated,

with a removable casing or covering pipe, G, which fits loosely aroundthe tube. This covering-pipe is shown as closed at its upper end andresting upon a plug, g, which closes the end of the tube (l. Obviously,however, the casing might be supported in suitable manner at its lowerend upon the tube or upon the supply-pipe B.

The dasher F, it will be observed, is provided with an annulardeflecting flange, f, at its lower end, has a handle by which to placeit in position when the blackwash is to be poured into the mold, and toremove it when the mold has been blacked, and admit of the removal ofthe casing-pipe G to allow of the drying of the mold, as fully set forthin the hereinbefore-referred-to application of Herbert R. Smith.

The dasher is hollowed out to receive the tube O and casing G a distancesufficient to allow the deflector-flange f on its lower edge to projectdown into the cylindrical part of the flask, for a purpose wellunderstood.

Obviously, instead of the casing G and dasher F being separate anddistinct from each other, they might be made together, the casingforming a continuation of the dasher, thus facilitating adjustment.

-The surplus blacking which would escape at the bottom of the flask, andbe lost in the absence of suitable provision for its retention, can becollected in a pan made to tit around the heating-pipe O and placedunder the mold during the blackwashing.

I claim as my invention- 1. The hereinbetore-desoribed hollow dasher orblackwash-deflector, adapted to fit over and be supported by the pipewhich passes through the flask and mold, as set forth.

2. The herein before-described covering-pipe, in combination with theperforated pipe in the center of the flask and mold, as set forth.

3. The combination, substantially as hereinbefore set forth, of theflask, the jet-pipe therein, the covering-pipe, and the dasher.

In testimony whereof I have hereunto subscribed my name.

NICHOLAS K. WADE.

Witnesses:

G. 0. RAND, T. P. OGDEN.

